Dorsal and ventral onlay refer to the position in which the flap is sutured to the edge of the incised urethra
, as in the dorsal or ventral position with respect to the urethra
and corpora cavernosa. Penile incision is carried out through the skin, dartos fascia, and down to the Buck fascia. A skin island flap is elevated on the penile dartos fascia, which serves as the vascular supply. A lateral urethrotomy is made along the course of the strictured area.